diff --git a/clusterman/commands/node.py b/clusterman/commands/node.py
index eb32d50..280cb2e 100644
--- a/clusterman/commands/node.py
+++ b/clusterman/commands/node.py
@@ -1,4 +1,4 @@
-import os, json
+import os, json, time
 from clusterman.config import CONF
 
 
@@ -37,7 +37,9 @@ def scan(timeout):
                     else:
                         print("")
     with open(CONF["paths"]["nodes"], "w") as f:
-        f.write(json.dumps(nodes))
+        f.write(json.dumps(nodes,indent=4))
+    CONF["cluster"]["last_scan"]=int(time.time())
+    CONF.save()
 
 def check(timeout):
     nodes_path=CONF["paths"]["nodes"]
diff --git a/clusterman/config.py b/clusterman/config.py
index 2a9b95b..db63778 100644
--- a/clusterman/config.py
+++ b/clusterman/config.py
@@ -12,7 +12,8 @@ class Config:
         "cluster": {
             "ip4_from": "10.128.0.133",
             "ip4_to": "10.128.0.140",
-            "ip4_ignore": ["10.0.0.5", "10.0.0.1"]
+            "ip4_ignore": ["10.0.0.5", "10.0.0.1"],
+            "last_scan": None
         },
         "timeout": 0.5
     }
@@ -31,7 +32,7 @@ class Config:
                 
     def save(self):
         with open(self.CONF_FILE, "w") as f:
-            f.write(json.dumps(self.config))
+            f.write(json.dumps(self.config,indent=4, sort_keys=True))
 
     def __getitem__(self, key):
         return self.config[key]